RAK831 gateway and RN2903 (end-deivce)

I'm student. I just get my project from my lecture. The project correlate LoRa technology. I use RAK831 of RAK company . But I had some LoRa modules RN2903. So I use RN2903 for nodes (end-device) and RAK831 for gateway. I'm worry about this case! Anyone can give me some advices.!!!.